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Description

In the Linux kernel, the following vulnerability has been resolved: net: vxlan: prevent NULL deref in vxlan_xmit_one Neither sock4 nor sock6 pointers are guaranteed to be non-NULL in vxlan_xmit_one, e.g. if the iface is brought down. This can lead to the following NULL dereference: BUG: kernel NULL pointer dereference, address: 0000000000000010 Oops: Oops: 0000 [#1] SMP NOPTI RIP: 0010:vxlan_xmit_one+0xbb3/0x1580 Call Trace: vxlan_xmit+0x429/0x610 dev_hard_start_xmit+0x55/0xa0 __dev_queue_xmit+0x6d0/0x7f0 ip_finish_output2+0x24b/0x590 ip_output+0x63/0x110 Mentioned commits changed the code path in vxlan_xmit_one and as a side effect the sock4/6 pointer validity checks in vxlan(6)_get_route were lost. Fix this by adding back checks. Since both commits being fixed were released in the same version (v6.7) and are strongly related, bundle the fixes in a single commit.

PUBLISHED Reserved 2025-12-16 | Published 2025-12-24 | Updated 2025-12-24 | Assigner Linux

Product status

Default status
unaffected

6f19b2c136d98a84d79030b53e23d405edfdc783 (git) before 4ac26aafdc8c7271414e2e7c0b2cb266a26591bc
affected

6f19b2c136d98a84d79030b53e23d405edfdc783 (git) before 1f73a56f986005f0bc64ed23873930e2ee4f5911
affected

Default status
affected

6.7
affected

Any version before 6.7
unaffected

6.18.2 (semver)
unaffected

6.19-rc1 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/4ac26aafdc8c7271414e2e7c0b2cb266a26591bc

git.kernel.org/...c/1f73a56f986005f0bc64ed23873930e2ee4f5911

cve.org (CVE-2025-68353)

nvd.nist.gov (CVE-2025-68353)

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Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.